Hot piles, little nitrogen
So we've all heard that a proper hot manure compost pile needs lots of high N manure from horse, cow, rabbit, goat etc, preferably with urine soaked bedding. also that pig and human manures are cold. So how is it that the sewage sludge mixed with chipped bark I hauled got as hot as any horse manure pile I ever made? also large nursery piles of chipped bark with no manure heat like crazy. I thought these materials had hardly any nitrogen.